Physiological Responses of Leucaena leucocephala Seedlings to Drought Stress

Yige, Chen; Chen, Fangqing; Liu, Lei; Zhu, Sixi

doi:10.1016/j.proeng.2012.01.691

Cited by 17 publications

(10 citation statements)

References 5 publications

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“…[63] and Leucaena leucocephala (Lam.) de Wit [60], indicating that the two fern species have the ability to maintain water content at the early stages of drought, but lost the ability at the late stages of drought [64,65]. Similar to the results of Deng et al [66], the RLWC of the two fern species increased after rehydration.…”

Section: The Responses Of Growth Traits To Drought Stresssupporting

confidence: 83%

“…The plasticity of plants is negatively correlated with the resistance activity to stress [58,59]. RLWC reflects the ability of plant leaves to maintain water balance, and the RLWC of plants with strong drought resistance would decrease with decreasing soil moisture in order to maintain normal physiological functioning of plants [60,61]. In this study, the RLWC of the two fern species showed a downward trend throughout the entire drought stress.…”

Section: The Responses Of Growth Traits To Drought Stressmentioning

confidence: 62%

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Growth, Secondary Metabolites and Enzyme Activity Responses of Two Edible Fern Species to Drought Stress and Rehydration in Northeast China

Wang

Gao

et al. 2019

Agronomy

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The drought resistance mechanism of Matteuccia struthiopteris (L.) Todar. and Athyrium multidentatum (Doll.) Ching were measured under natural drought exposure. The results showed that the two edible fern species showed stronger resistance in the early stages of drought, mainly expressed as the decrease of relative leaf water content (RLWC), increase of osmotic substances, secondary metabolites such as flavonoids (FC), total phenols (TPC), proantho cyanidins (PCC) content and enzyme activity (superoxide dismutase (SOD), peroxidase (POD), catalase (CAT) and ascorbate peroxidase (APX)). The higher RLWC, FC, TPC, PCC and abscisic acid (ABA) content and lower H2O2 content indicates the stronger non-enzymatic antioxidant system and drought resistance of A. multidentatum. However, the proline (Pro) content changed slowly, and the synthesis of soluble protein (SP), total phenols, proantho cyanidins and ABA, SOD activity of two fern species were inhibited in the late stages of drought stress. This study can provide a scientific basis for the cultivation and utilization of edible fern species under forest in Northeast China.

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Section: The Responses Of Growth Traits To Drought Stresssupporting

confidence: 83%

Section: The Responses Of Growth Traits To Drought Stressmentioning

confidence: 62%

Growth, Secondary Metabolites and Enzyme Activity Responses of Two Edible Fern Species to Drought Stress and Rehydration in Northeast China

Wang

Gao

et al. 2019

Agronomy

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“…de Wit, a leguminous tree with wide distribution in various countries, including Brazil, has been indicated as a species appropriate for composing reforestation systems in degraded areas (Bichoff et al, 2018). It makes an ecologically important contribution by improving the soil, fixing nitrogen, and controlling erosion in arid regions (Yige et al, 2012). L. leucocephala is propagated sexually (Costa;Durigan, 2010).…”

Section: Introductionmentioning

confidence: 99%

Parameters based on X-ray images to assess the physical and physiological quality of Leucaena leucocephala seeds

et al. 2018

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Non-destructive and high performance analyses are highly desirable and important for assessing the quality of forest seeds. The aim of this study was to relate parameters obtained from semi-automated analysis of radiographs of Leucaena leucocephala seeds to their physiological potential by means of multivariate analysis. To do so, seeds from five lots collected from parent trees from the region of Viçosa, MG, Brazil, were used. The study was carried out through analysis of radiographic images of seeds, from which the percentage of damaged seeds (predation and fungi), and measurements of area, perimeter, circularity, relative density, and integrated density of the seeds were obtained. After the X-ray test, the seeds were tested for germination in order to assess variables related to seed physiological quality. Multivariate statistics were applied to the data generated, with use of principal component analysis (PCA). X-ray testing allowed visualization of details of the internal structure of seeds and differences regarding density of seed tissues. Semi-automated analysis of radiographic images of Leucaena leucocephala seeds provides information on seed physical characteristics and generates parameters related to seed physiological quality in a simple, fast, and inexpensive manner.

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“…Drought stress has a wide range of effects on the morphological, physiological, and biochemical processes in plants, and it can negatively affect the productivity of both dry land and irrigated crops [ 16 – 18 ]. Drought-tolerant plants usually possess a combination of distinct morphological and physiological characteristics such as reduced leaf area, an extensive root system, the ability to sustain high leaf tissue water potential, and maintenance of a higher chlorophyll content and photosynthetic efficiency under drought conditions [ 19 , 20 ]. Physiological measurements such as leaf relative water content (RWC), electrolyte leakage (EL), photosynthetic rate (Pn), stomatal conductance (g s ), transpiration rate (Tr), and water use efficiency (WUE) have been widely used as markers for evaluating drought stress tolerance in various plant species [ 21 , 22 ].…”

Section: Introductionmentioning

confidence: 99%

Assessment of drought tolerance of 49 switchgrass (Panicum virgatum) genotypes using physiological and morphological parameters

Liu

Zhang

Tran

et al. 2015

Biotechnol Biofuels

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105

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BackgroundSwitchgrass (Panicum virgatum L.) is a warm-season C4 grass that is a target lignocellulosic biofuel species. In many regions, drought stress is one of the major limiting factors for switchgrass growth. The objective of this study was to evaluate the drought tolerance of 49 switchgrass genotypes. The relative drought stress tolerance was determined based on a set of parameters including plant height, leaf length, leaf width, leaf sheath length, leaf relative water content (RWC), electrolyte leakage (EL), photosynthetic rate (Pn), stomatal conductance (gs), transpiration rate (Tr), intercellular CO2 concentration (Ci), and water use efficiency (WUE).ResultsSRAP marker analysis determined that the selected 49 switchgrass genotypes represent a diverse genetic pool of switchgrass germplasm. Principal component analysis (PCA) and drought stress indexes (DSI) of each physiological parameter showed significant differences in the drought stress tolerance among the 49 genotypes. Heatmap and PCA data revealed that physiological parameters are more sensitive than morphological parameters in distinguishing the control and drought treatments. Metabolite profiling data found that under drought stress, the five best drought-tolerant genotypes tended to have higher levels of abscisic acid (ABA), spermine, trehalose, and fructose in comparison to the five most drought-sensitive genotypes.ConclusionBased on PCA ranking value, the genotypes TEM-SEC, TEM-LoDorm, BN-13645-64, Alamo, BN-10860-61, BN-12323-69, TEM-SLC, T-2086, T-2100, T-2101, Caddo, and Blackwell-1 had relatively higher ranking values, indicating that they are more tolerant to drought. In contrast, the genotypes Grif Nebraska 28, Grenville-2, Central Iowa Germplasm, Cave-in-Rock, Dacotah, and Nebraska 28 were found to be relatively sensitive to drought stress. By analyzing physiological response parameters and different metabolic profiles, the methods utilized in this study identified drought-tolerant and drought-sensitive switchgrass genotypes. These results provide a foundation for future research directed at understanding the molecular mechanisms underlying switchgrass tolerance to drought.Electronic supplementary materialThe online version of this article (doi:10.1186/s13068-015-0342-8) contains supplementary material, which is available to authorized users.

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Physiological Responses of Leucaena leucocephala Seedlings to Drought Stress

Cited by 17 publications

References 5 publications

Growth, Secondary Metabolites and Enzyme Activity Responses of Two Edible Fern Species to Drought Stress and Rehydration in Northeast China

Growth, Secondary Metabolites and Enzyme Activity Responses of Two Edible Fern Species to Drought Stress and Rehydration in Northeast China

Parameters based on X-ray images to assess the physical and physiological quality of Leucaena leucocephala seeds

Assessment of drought tolerance of 49 switchgrass (Panicum virgatum) genotypes using physiological and morphological parameters

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